Computer science major Chu Sang-woo (Park Jae-chan) is the embodiment of an inflexible and strict rule-abiding person. While working on a liberal arts group project with freeloaders who don't put in any effort, Sang-woo decides to remove their names from the final presentation. But he didn't imagine how involved he would become with the person whose plans to study abroad were messed up because of that project. The involved person, the popular campus star who everyone knows, Department of Design's Jang Jae-young (Park Seo-ham). He has everything from skills, looks, family background and good relationships, except for one big problem, Chu Sang-woo. What happens when an engineer and an artist whose personalities are like oil and water, have to work together? Jae-young is like a semantic error in the perfect world of Sang-woo. Will Sang-woo be able to debug this?